PhotoPrompt.java

/*******************************************************************************
 * Copyright 2011 The Regents of the University of California
 * 
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *   http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 ******************************************************************************/
package org.ohmage.prompt.media;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.drawable.BitmapDrawable;
import android.net.Uri;
import android.provider.MediaStore;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ImageButton;
import android.widget.ImageView;

import org.ohmage.R;
import org.ohmage.Utilities;
import org.ohmage.activity.SurveyActivity;
import org.ohmage.logprobe.Log;

public class PhotoPrompt extends MediaPrompt {

	private static final String TAG = "PhotoPrompt";

	Integer mResolution = 800;

	public PhotoPrompt() {
		super();
	}

	public void setResolution(String res) {
	    try{
	        this.mResolution = Integer.parseInt(res);
	    } catch(NumberFormatException e) {
	        Log.e(TAG, "Error parsing resolution for image", e);
	    }
	}

	/**
	 * The text to be displayed to the user if the prompt is considered
	 * unanswered.
	 */
	@Override
	public String getUnansweredPromptText() {
		return("Please take a picture of something before continuing.");
	}

	@Override
	public void handleActivityResult(Context context, int resultCode, Intent data) {
		if (resultCode == Activity.RESULT_OK) {

		    if(mResolution != null) {
		        // Give the image two tries to resize... and then we just use the
		        // original size? there is not much we can do here
		        if(!Utilities.resizeImageFile(getMedia(), mResolution)) {
		            System.gc();
		            Log.e(TAG, "First image resize failed. Trying again.");
		            if(!Utilities.resizeImageFile(getMedia(), mResolution)) {
		                Log.e(TAG, "Second image resize failed. Using original size image");
		            }
		        }
		    }

			((SurveyActivity) context).reloadCurrentPrompt();
		} 
	}

	@Override
	public View inflateView(Context context, ViewGroup parent) {
		super.inflateView(context, parent);

		LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
		View layout = inflater.inflate(R.layout.prompt_photo, parent);

		ImageButton button = (ImageButton) layout.findViewById(R.id.photo_button);
		ImageView imageView = (ImageView) layout.findViewById(R.id.image_view);

		if (isPromptAnswered()) {
			imageView.setImageBitmap(BitmapFactory.decodeFile(getMedia().getAbsolutePath()));
		}

		final Activity act = (Activity) context;

		button.setOnClickListener(new OnClickListener() {

			@Override
			public void onClick(View v) {
				Intent intent = new Intent(MediaStore.ACTION_IMAGE_CAPTURE);
				intent.putExtra(MediaStore.EXTRA_OUTPUT, Uri.fromFile(getMedia()));
				act.startActivityForResult(intent, REQUEST_CODE);

			}
		});

		return layout;
	}

	/**
	 * Recycles the image if it was set
	 * @param view
	 */
	public static void clearView(ViewGroup view) {
		ImageView imageView = (ImageView) view.findViewById(R.id.image_view);
		// If there is an old BitmapDrawable we have to recycle it
		if(imageView != null && imageView.getDrawable() instanceof BitmapDrawable) {
			Bitmap b = ((BitmapDrawable)imageView.getDrawable()).getBitmap();
			if(b != null) {
				b.recycle();
				b = null;
			}
		}
	}
}